The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The Approach and Landing (A&L) trajectory optimization is important for reusable launch vehicle (RLV) to deliver it to its landing site safely and reliably. And the trajectory should satisfy multi-constraints and path features. In this paper, the 3D dynamics of RLV in the A&L phase is introduced. and the the adaptive Gauss pseudo-spectral method (AGPM) is used to solve the A&L trajectory...
Comparing to the original backprojection (BP) algorithm, the fast factorized backprojection algorithm accelerates enormously by dividing the synthetic aperture into many small pieces and finishes the BP integral in many stages. Numerous two-dimensional (2-D) image interpolation operations are utilized to raise accuracy. In this letter, a new factorized backprojection algorithm is proposed where no...
In this paper, an interpolation-free fast factorized back-projection (IF-FFBP) algorithm is proposed for high-resolution spotlight synthetic aperture radar (SAR) processing. Different from the original FFBP utilizing two-dimensional image-domain interpolation for sub-aperture fusion, IF-FFBP finishes the image merging steps using chirp-z transform and circular shifting. Under the restriction of the...
A fast implementation method for the fast factorized back-projection (FIM-FFBP) algorithm is proposed to focus high-resolution spotlight synthetic aperture radar (SAR) data. Different from the original FFBP utilizing two-dimensional image-domain interpolation for sub-aperture fusion, FIM-FFBP finishes the image fusion using chirp-z transform and circular shifting. FIM-FFBP yields enhanced efficiency...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.